
Concept explainers
Interpretation: The main characteristics of
Concept introduction:
Oxidation: It involves the loss of electrons.
Reduction: It involves the gain of electrons.
The reaction in which oxidation and reduction take place is called a redox reaction.

Answer to Problem 33A
Characteristics of oxidation:
- It involves the loss of electrons.
- Addition of oxygen
- Removal of hydrogen
- Addition of electronegative element
- Removal of an electropositive element
- Increase in oxidation number of the element
Characteristics of reduction:
- It involves the gain of electrons.
- Addition of hydrogen
- Removal of oxygen
- Addition of electropositive element
- Removal of electronegative element
- A decrease in oxidation number of the element
Explanation of Solution
A substance when undergo oxidation is said to be oxidized and which undergo reduction is said to be reduced.
Example of oxidation reaction:
Example of reduction reaction:
Thus it can be concluded that
Oxidation involves:
- Loss of electrons
- Addition of oxygen
- Removal of hydrogen
- Addition of electronegative element
- Removal of an electropositive element
- Increase in oxidation number of the element
Reduction involves:
- A gain of electrons
- Addition of hydrogen
- Removal of oxygen
- Addition of electropositive element
- Removal of electronegative element
- A decrease in oxidation number of the element
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Chapter 19 Solutions
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